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Mathematics
Andrés Villa's user avatar
Andrés Villa's user avatar
Andrés Villa's user avatar
Andrés Villa
  • Member for 5 years, 7 months
  • Last seen more than a month ago
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I am Colombian, I love mathematics but I study environmental engineering.

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question
4
If $ A $ is a $ 2 \times 2 $ real matrix such that $ \det (A) = 1 $ and $ A^n = I$ show that $ A ^tA = I $
Aug 7, 2020
question
4
Calculate: $\int_0^\infty [x]e^{-x} \, dx$ where $[x]:=\max \{k\in\mathbb{Z}:k\leq x\}$
Aug 7, 2020
question
3
When is the integral of a function well defined with respect to a signed measure?
May 20, 2020
question
3
Find the convergence interval of the series $ \sum_{n = 0}^{\infty} (\frac {x} {1 + x}) ^n.$
May 17, 2020
question
3
(The area under the curve of the bell of Gauss)
Dec 13, 2019
question
2
Show that $ G $ is isomorphic to the direct product of $ H $ and $ K $.
Aug 16, 2020
answer
2
How do I evaluate $\int x^t e^{x^3}\,\mathrm{d}t$?
Apr 30, 2020
answer
2
How to prove $\overline{\overline{A}\cup\overline{B}}\cup\overline{\overline{A}\cup B}=A$.
Oct 21, 2019
question
2
Calculate partial derivatives $f_x(x,y)$ and $f_y(x,y)$ if $f(x,y)=\int_{\int_y^xg(t)dt}^{\int_x^yg(t)dt}g(t)dt$
Sep 29, 2019
answer
2
Cartesian Product of a Set with One Element and An Interval
Sep 26, 2019